How can I UPDATE specific GridView columns based on a CheckBox in one column

Question

My GridView has an \"Active\" CheckBox, to indicate whether the record is active or not. It\'s just a flag, a bit value in the database.

I need to UPDATE the \"Activate

Answer 1

This is how I would do it. First add an TemplateField to your GridView to hold the CheckBox and add a OnCheckedChanged event to the CheckBox and set AutoPostBack to true. Then set the DataKeyNames in the GridView. The value should be your database index or identifier. In your case probably programid. The resulting GridView would look like this.

Then in code behind the CheckBox1_CheckedChanged method.

protected void CheckBox1_CheckedChanged(object sender, EventArgs e)
{
    //get the current datagrid item from the sender
    GridViewRow row = (GridViewRow)(((Control)sender).NamingContainer);

    //get the correct programid from the datakeys
    int programid = Convert.ToInt32(GridView1.DataKeys[row.DataItemIndex].Values[0]);

    //cast the sender back to a checkbox
    CheckBox cb = sender as CheckBox;

    //create the sql string
    string sqlString = "UPDATE programs SET ActivatedBy = @ActivatedBy WHERE (programid = @programid)";

    //create a connection to the db and a command
    using (SqlConnection connection = new SqlConnection(myConnectionString))
    using (SqlCommand command = new SqlCommand(sqlString, connection))
    {
        //set the proper command type
        command.CommandType = CommandType.Text;

        //replace the parameters
        command.Parameters.Add("@ActivatedBy", SqlDbType.Bit).Value = cb.Checked;
        command.Parameters.Add("@programid", SqlDbType.Int).Value = programid;

        try
        {
            //open the db and execute the sql string
            connection.Open();
            command.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            //catch any errors like unable to open db or errors in command. view with ex.Message
            Response.Write(ex.Message);
        }
    }
}